"The Official Gaming Coins of the World's Greatest Casinos" from the Franklin Mint.

I have the above named set of sterling silver gaming coins and would like to learn their appraisal value.

More specifically, there are 25 coins in a special coin box titled "The Official Gaming Coins of the World's Greatest Casinos". The inscription in side the leather green box (I think it is actually a nice imitation leather) reads: "Certificate of Authenticity".

The certificate states that it is a limited edition Proof Set minted in solid sterling silver. It is further certified that each gaming coiins is an offical issue of one of the world's great sasinos and is fully redeemable for its face value at the casino of issue.

The certification is dated 8/10/1978 by Wlilliam F. Krieg, Vice President, Collector Relations, for the Franklin Mint.

Thank you in advance for your assistance.

- James